1. Horsethief Butte Trail: This 2-mile loop trail offers stunning views of the Columbia River Gorge and is suitable for all skill levels.

2. Petroglyphs Loop Trail: A short, easy walk that takes you to a collection of ancient petroglyphs preserved within the park boundaries.

3. Dalles Mountain Ranch Trails: These trails offer longer hikes through rolling hills with panoramic vistas over both Washington and Oregon landscapes.

4. Crawford Oaks Hiking Area Trails: Located at the eastern end of Horsethief Lake State Park, these trails provide access to oak woodlands, grassy meadows filled with wildflowers in springtime, as well as wetland habitats along Eightmile Creek.

5. Temani Pesh-wa Interpretive Trail: An interpretative hike where visitors can learn about Native American history while enjoying scenic lake views.

6. Horsetheif Plateau Loop: It's an adventurous hiking route offering breathtaking cliffside panoramas across vast expanses.

7. East End Loops: The East End loops are perfect for those looking for shorter walks or runs around beautiful natural scenery without venturing too far into wilderness areas.

8. Little Maui Bike Path: Although primarily used by mountain bikers this path also serves hikers who want a more challenging terrain experience.

9. Columbia Hills Historical State Park Connector: Connects directly from Horse Thief Lake providing additional miles worth exploring including waterfalls and wildlife sightings.

Horsethief Lake has two boat ramps one to Horsethief Lake itself and one to the Columbia River. Kayak and paddleboat rentals are offered at the lake during peak season, however, strong winds common in the area can limit rental boat availability.

Horsethief Lake is the only lake entirely within a Washington state park that allows motorized boats. Due to its small size, there is a 5 mph speed limit and waterskiing/wake boarding and similar speed required boating activities are not allowed.